procfs_osrel.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2009 Konstantin Belousov
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/proc.h>
   37 #include <sys/sbuf.h>
   38 #include <sys/uio.h>
   39 
   40 #include <fs/pseudofs/pseudofs.h>
   41 #include <fs/procfs/procfs.h>
   42 
   43 int
   44 procfs_doosrel(PFS_FILL_ARGS)
   45 {
   46         const char *pp;
   47         int ov, osrel, i;
   48 
   49         if (uio == NULL)
   50                 return (EOPNOTSUPP);
   51         if (uio->uio_rw == UIO_READ) {
   52                 sbuf_printf(sb, "%d\n", p->p_osrel);
   53         } else {
   54                 sbuf_trim(sb);
   55                 sbuf_finish(sb);
   56                 pp = sbuf_data(sb);
   57                 osrel = 0;
   58                 i = sbuf_len(sb);
   59                 while (i--) {
   60                         if (*pp < '' || *pp > '9')
   61                                 return (EINVAL);
   62                         ov = osrel * 10 + *pp++ - '';
   63                         if (ov < osrel)
   64                                 return (EINVAL);
   65                         osrel = ov;
   66                 }
   67                 p->p_osrel = osrel;
   68         }
   69         return (0);
   70 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/procfs/procfs_osrel.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/procfs/procfs_osrel.c